@misc{plunkett2026signatures,
  title={Signatures of a subpopulation of hierarchical mergers in the GWTC-4 gravitational-wave dataset},
  author={Cailin Plunkett and Thomas Callister and Michael Zevin and Salvatore Vitale},
  year={2026},
  eprint={2601.07908},
  archivePrefix={arXiv},
  primaryClass={gr-qc},
  url={https://arxiv.org/abs/2601.07908}
}